Smith A B, Hirschmann R, Pasternak A, Akaishi R, Guzman M C, Jones D R, Keenan T P, Sprengeler P A, Darke P L, Emini E A
Department of Chemistry, University of Pennsylvania, Philadelphia 19104.
J Med Chem. 1994 Jan 21;37(2):215-8. doi: 10.1021/jm00028a001.